chore: make this a pure lua plugin (#33)

replace plugin/flow.vim with plugin/flow.lua

Closes #26

plugin/flow.lua

@@ -0,0 +1,56 @@
+-- Check if the plugin is already loaded
+if vim.g.loaded_flow then
+  return
+end
+
+-- Commands
+vim.api.nvim_create_user_command('FlowRunFile', function()
+  require('flow').run_file()
+end, {})
+
+vim.api.nvim_create_user_command('FlowSetCustomCmd', function(opts)
+  require('flow.cmd').set_custom_cmd(opts.args)
+end, { nargs = '?' })
+
+vim.api.nvim_create_user_command('FlowRunCustomCmd', function(opts)
+  require('flow').run_custom_cmd(opts.args)
+end, { nargs = '?' })
+
+vim.api.nvim_create_user_command('FlowReload', function()
+  require('flow').reload_plugin()
+end, {})
+
+vim.api.nvim_create_user_command('FlowRunSelected', function(opts)
+  require('flow').run_range({opts.line1, opts.line2})
+end, { nargs = '*', range = true })
+
+vim.api.nvim_create_user_command('FlowLauncher', function()
+  require('flow.telescope').custom_cmds()
+end, {})
+
+vim.api.nvim_create_user_command('FlowRunLastCmd', function()
+  require('flow').run_last_custom_cmd()
+end, {})
+
+vim.api.nvim_create_user_command('FlowLastOutput', function()
+  require('flow').show_last_output()
+end, {})
+
+vim.api.nvim_create_user_command('FlowRunMDBlock', function()
+  require('flow').run_block()
+end, {})
+
+-- Autocommand
+vim.api.nvim_create_autocmd('FileType', {
+  pattern = 'run-code-output',
+  callback = function()
+    vim.api.nvim_create_autocmd('BufDelete', {
+      callback = function()
+        require('flow.output').reset_output_win()
+      end,
+    })
+  end,
+})
+
+-- Mark the plugin as loaded
+vim.g.loaded_flow = 1